Interesting idea! Maybe you could do it 'live' using a transparent curved display as the shade and a Kinect or equivalent...
One thing that also bugged me is the fact that an isotropic light source forms an unevenly-lit image, so maybe you'd want an anisotropic emitter too.
At this stage you've basically invented Illumiroom and you may as well just use a wide angle projector. You don't have full 360 coverage though so you'd need several projectors.
